Defined Benefit and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2014

Trustmark Capital Accumulation Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

Net periodic benefit cost

The following table presents information regarding net periodic benefit cost for Trustmark’s qualified pension plans for the periods presented ($ in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2014			2013			2014			2013
Net periodic benefit cost:
Service cost	$	123		$	148		$	372		$	446
Interest cost		1,328			1,252			3,971			3,506
Expected return on plan assets		(1,563	)		(2,060	)		(4,681	)		(5,660	)
Recognized net loss due to settlement		1,709			838			2,459			1,363
Recognized net actuarial (gain) loss		(1,701	)		1,374			(229	)		4,142
Net periodic benefit cost	$	(104	)	$	1,552		$	1,892		$	3,797

Supplemental Retirement Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

Net periodic benefit cost

The following table presents information regarding net periodic benefit cost for Trustmark’s nonqualified supplemental retirement plans for the periods presented ($ in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Net periodic benefit cost:
Service cost	$	74	$	150	$	222	$	448
Interest cost		548		484		1,650		1,452
Amortization of prior service cost		63		62		188		188
Recognized net actuarial loss		164		260		497		778
Net periodic benefit cost	$	849	$	956	$	2,557	$	2,866